A dual-frequency circularly polarized planar reflectarray antenna with a frequency-selective structure

Abstract

The invention discloses a double-frequency circularly polarized planar reflection array antenna with a frequency-selective structure. The double-frequency circularly polarized planar reflection array antenna comprises a circular polarization feed source and a laminated antenna structure; the laminated antenna structure comprises a first dielectric plate, a first foam layer, a second dielectric layer, a second foam layer and a third dielectric plate; the upper surface and lower surface of the first dielectric plate are provided with a first metal circuit pattern and a second metal circuit pattern respectively; the first metal circuit pattern includes a plurality of phase adjustment units of which the adjustment phases are not completely the same; the upper surface of the second dielectric layer is provided with a third metal circuit pattern; and the upper surface and lower surface of the third dielectric plate are provided with a fourth metal pattern and a metal ground plate respectively. According to the double-frequency circularly polarized planar reflection array antenna, the second metal pattern and the third metal pattern are of the same structure so as to realize frequency selection; electromagnetic coupling between two frequency units can be completely suppressed; the design difficulty and design cycle of a double-frequency reflection array can be greatly reduced; and the radiation performance of the reflection array, such as aperture efficiency and gain bandwidth, can be effectively improved.

Description

technical field [0001] The invention belongs to the field of wireless communication antennas and specifically designs a dual-frequency circularly polarized planar reflection array antenna with a frequency selection structure. Background technique [0002] With the vigorous development of the satellite communication industry, high-gain antennas, as electromagnetic energy transceivers, are an essential and important component of the entire communication system. Traditional high-gain antennas are mainly parabolic antennas (so-called "pot" antennas) and large flat-panel array antennas. Large panel array antennas include microstrip arrays and waveguide slot array antennas. However, parabolic antennas are bulky and heavy, and the reflective surface is a curved surface structure. It needs to maintain excellent surface smoothness during processing and production, resulting in high processing requirements and difficult production, especially in high-frequency bands, such as millimet...

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Problems solved by technology

However, due to the inherent characteristics of the microstrip array, its gain bandwidth is generally narrow

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